| Gaithersburg to Brescia | 4,259.89 mi (6,855.62 km) |
| Gaithersburg to Bressanone | 4,281.72 mi (6,890.76 km) |
| Gaithersburg to Bresso | 4,215.77 mi (6,784.62 km) |
| Gaithersburg to Brindisi | 4,768.11 mi (7,673.54 km) |
| Gaithersburg to Broni | 4,234.34 mi (6,814.52 km) |
| Gaithersburg to Bronte | 4,740.14 mi (7,628.52 km) |
| Gaithersburg to Brugherio | 4,220.25 mi (6,791.83 km) |
| Gaithersburg to Brugnera | 4,345.59 mi (6,993.55 km) |
| Gaithersburg to Bruino | 4,158.12 mi (6,691.85 km) |
| Gaithersburg to Brunico | 4,290.62 mi (6,905.08 km) |
| Gaithersburg to Brusciano | 4,603.53 mi (7,408.66 km) |
| Gaithersburg to Bucine | 4,389.13 mi (7,063.63 km) |
| Gaithersburg to Budrio | 4,349.01 mi (6,999.06 km) |
| Gaithersburg to Busca | 4,173.93 mi (6,717.29 km) |
| Gaithersburg to Bussolengo | 4,289.07 mi (6,902.59 km) |
